#include <iostream>
#include <string>
using namespace std;
int main()
{
	string word;
	int num=0;
	getline(cin,word);
	for(int i=0;i<word.length();i++)
	{
		if(word[i]=='a'||word[i]=='d'||word[i]=='g'||word[i]=='j'||word[i]=='m'||word[i]=='p'||word[i]=='t'||word[i]=='w'||word[i]==' ')
		{
			num++;	
		}
		else if(word[i]=='b'||word[i]=='e'||word[i]=='h'||word[i]=='k'||word[i]=='n'||word[i]=='q'||word[i]=='u'||word[i]=='x')
		{
			num=num+2;
			}
		else if(word[i]=='c'||word[i]=='f'||word[i]=='i'||word[i]=='l'||word[i]=='o'||word[i]=='r'||word[i]=='v'||word[i]=='y')
		{
			num=num+3;
			}	
		else
			num=num+4;
	}
	cout<<num<<endl;
	return 0;
}